Rotary pump.



R. M..BLAGKMER.

ROTARY PUMP.

APPLICATION FILED IIIB.11,1011.

1,080,676. Patented nec. 9, 1913.

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R. M. BLAGKMER. ROTARY PUMP.

APPLIOATIOH FILED FEB. 11. 1911.

1,080,676. Patented Dec. 9, 1913.

2 SHEETS-SHEET 2.

'Fig 6.

Atlunu'ga ROBERT M. BLACKMER, OF MONON'GAHELA, PENNSYLVANIA.

ROTARY PUMP.

Specification of Letters Patent.

' Application med February 11, 1911. serial No. 607,926. r

Patented Dee. 9, 1913.-'

To ati whom,- z'tm concern:

Be it known t at I, ROBERT M. BLACK- MER, a citizen ofthe United States,residing at Monongahela, county of lVashington,

`State oPennsylvania, have invented a ce1'- tain new and usefulImprovement in Rotary Pumps, and declare the following to be a full,clear, and exact description ot the' an improved Abucket construction,an improvedfluid inlet construction and an improved fluidv outletconstruction; the Huid enters through an inlet in the sidewall,

- divides and enters the cylinder through the end walls7 -leaves thecylinder through the end walls and leaves the pump through a, passage inthe side wall; the bucket carried by a rotary carrier swings in a,pocket, carries an oscillating wing member which engages with a minimumof frictional resistance against the carrier and yet serves as anadequate packing member.`

In the drawings: Figure 1, is a side elevation of the pump with the endcusin removed. Fig. -2, is a perspective o the bucket and packingmember. Fig. 3, is a vertical section along line 33 of Fig. 1. Fig. 4,is a diagram of the arch curvatures of the cylinder cavity. 'F ig. 5, isan elevation of the end of the cylinder. Fig. 6, is an (inside)elevation of an end plate of the cylinder. v

The main part 1 of the cylinder case is circular in its generaloutline,'isl provided with foot -pl'ate 1, with .an inlet 2 and' anoutlet- 2; the inlet 2a communicates directly with a chamber 17 in theWall of the casing;

the chamber 17 is separated from the cylinder chamber `by a diaphragm23; the edges of the diaphragm engage along the middle' line of 'by passcavities 24,' 25, in thev end plates 18, 19. The chamber 16 is separatedfrom the cylinder chamber by a diaphragm 22, the edges of which engagealong the middle line of by-pass cavities 20, 21 in the end plates 18,19; by this construction,'the

arched boundary of the cylinder is 'unbroken by either inlet or outletand lthe bearingV edge of the bucket wing 10 wears evenly.

The casing chamber is bounded'- by four?? arched surfaces whosecurvatures are struck from` two centers.

3 and a radius substantmlly e ual to that of the bucket carrier 5. Theousing. arc extends from'substantially a point lop site the end of .-theintake port 25 to. sulistautially a point opposite the nearer end Vofthe outlet port 21 (Fig. 1). The archedv surface 0,'d, extends from apoint ,substantially opposite the other 'end of the intake port. 25 to apoint substantially opposite the other end of the outlet port 21. Thisarc I term an extension arc and 'it is struck fromI the same center 3 as'thehousing arc, but with a longer radius. The connecting arcs aye, andb, al, connect these two first .mentioned arcs and it is desirable inmaking such connection that the entire surface. of the intrior of thechamber should lapproximate the interior of a cylinder as near as may bepossible. It is also a desideratum to have lthe loady thrown upon thebuckets gradually and with' substantial uniformity, Itis alsol necessaryfor goodresults from a pump of this type that the maximum out-throw otthe buckets be attained While they are passing the intake port so thatthe out-throw of thebuckets from the end of the'intake port to the oposite end of the outlet port is uniformz tiereby eliminating any tenn-lency to skip over portions of the surface of the casing and therebyallow .leakage'and cause loss-of efficiency. The approximation of acontinuous ,interior surface'of a casing and the elimination, as much asmay he, of `juttying surfaces to cause wear upon the buckets I haveaccomplished by the way the connecting` arcsv are formed'. Thiss bybisecting the housin are and drawinga line 'from bisecting point throughthe' center 3 and atavpoint shortly removedyon 4the farther side oncenter 3 from thehousing arc' a, b, striking arcs which will eonnecethehousing are a, b, andthe comiecting arc c, d', fat points adjacenttheends ofl the intake and out-let ports. 4

It is seen from the drawingsvthat the in,

take and outlet ports arexabout ninety idegrees apart and that the ports.p21-and 25. which ,lead into the ends of the cylinder, each'occupabout'forty-ive degrees Iof thel complete t ree hundredy and sixtydegrees of the cylinder.y ,The exact point for locating the figure 4c'annotbe stated descrip- The arc from a tot),- whlch'I call the housinarc, has a center f the otherport. Y

tively, but it may be-'easily ascertainedby trial and is quitedefinitely shown in the diagram 4ot Fig. 4.

gram, vit is seen that a minimum juttying surface at the juncture of thearcs is afforded', and by reference. to Fig.- 1, it is seen-that thejuncture of the arcs are, in cach instance, at substantially the end ofthe ports in the endplates. V

The improved results obtained by this structure isa minimum of wear on'the buckets, a graduationof the placement and' removal ofthe load from'the'bucket-due to the lconnecting arcsv adjacent the ports, and auniform out-throw for the buckets from one port end'to the other port'end due' tothe extension chamber extending from the end of one port totheopposed' end 'of A haft 35'is mountedl to rotate on the l center 3and has'secured to 'ita vbucket carrier- 'with a number of'pockets; eachVao and extends ifrom the'periphery toward the pocket has a bearingsocket 84 in which engages the hub' 15 of the bucket; the face of thepocket opposite the socket 8 curves ,in an larch `concentric with thecenter of the soeket center -oit the carrier.4 The bucket as a ,whole 1sa Ty shaped member madem two parts, one of the arms of the T being piv--votally connectedl to the 4remainder of the 'member by a pivot locatedat the cross;

" the larger or main part of the member con/iprises a' wing 10 (one armof the cross) a hub adapted to engage in the-socket 8' @aptes of thispat-ent may 'be obtained for and arms `9, 9a which unite thelmb tothewing 10; at the turn from the arms 9 to the ,w'ing, and onthe sideopposite thel wing is a socket groove 14: which forms a bearing for ahub -11 on the oscillating'wing 13, a web extends from the hub andcarries a wiping flange 12v adapted to engage closely 4against thearchedsurface 6; the opening into the groove 14 is sufficiently wide toallow the wing 13,to swing through a short path and tol'engage closelyagainst Athe arched surface 6.- The inertia of the water which is struckby the buckets as they sweep along, insures a close engagement of thelangeY 12 against the face 6, which, however, is entirely relaxed assoon as' the bucket reaches the discharge and the pressure is equalizedon lthe wing 13.

What Ieclaim is:-

1". In lai'otarypump, i'neombinat-ion with a bucket carrier providedwith bucket sockets having an arched bearing face, a bucket adapted toswing inV said socket and a packing member pivotally connected to .saidbucket and adapted toswing thereon always in vcontact withsaid archedbearing lface,-

